in attendance will be president obama and first lady michelle obama. former president george bush and laura and former president clinton and hillary. clinton sat down today and recalled mandela's long years in prison. >> i said, tell me how this changed you. how did you give up 27 of the best years of your life and come out a better than than you went in. he said i realized they could take everything from me except my mind and my heart. those things i would have to give them. he said, i decided not to give them away. >> reporter: all told, there are ten days of national mourning for the late nelson mandela. considering the emotions we're seeing, that might not be enough. >> greg, thank you. >>> much of the u.s. is facing down right wintry blast with frigid temps, ice and snow. several deaths have been reported, most resulting from treacherous driving conditions. hundreds of flights have been canceled. the national weather service issued ice warnings for at least eight states. the temperature in parts of north dakota, as you see here, registered a few d